mitt romney. the debate is wednesday night in denver. while the presidential contenders get ready for the debate, we'll be talking about america's state of discord provided in a new documentary. i'll be talking to the producer and director behind the movie. "the next list" with dr. sanjay gupta starts now. >> i live in this village for 15 years. i came forward with trash. >> susannah was also regarded as a little bit crazy. first of all, she looks like this wild person. >> i said, you are crazy, you are totally crazy. you want to build with this? and then on october 5, we had first big hurricane here, and 25 houses were ripped right out. >> and then there was suddenly this huge need for rebuilding, and there were those empty bottles filled with those little papers that the children had been stuffing and stuffing and stuffing. >> plastic bottles stuffed with trash. unlikely building material. >> it is a container for trash. >> but when a hurricane demolish demolished an area of ghana, they saw its value. >> we said, i can't believe it. do